Development of an efficient remediation system with a low cost after identification of water pollutants including phenolic compounds in a tannery built-up area in Bangladesh
Development of an efficient remediation system with a low cost after identification of water pollutants including phenolic compounds in a tannery built-up area in Bangladesh
复制标题
在孟加拉国制革厂建成区鉴定出包括酚类化合物在内的水污染物后，开发了一种低成本的高效修复系统
DOI：
10.1016/j.chemosphere.2021.130959
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发表时间：
2021
期刊：
影响因子：
8.8
通讯作者：
Kato Masashi
中科院分区：
文献类型：
--
作者：
Yuan Tian;Tazaki Akira;Hashimoto Kazunori;Al Hossain M.M. Aeorangajeb;Kurniasari Fitri;Ohgami Nobutaka;Aoki Masayo;Ahsan Nazmul;Akhand Anwarul Azim;Kato Masashi
制革废水造成的水污染是发展中国家的一个重要问题。以铬为代表的无机化学物是制革的主要污染物，其污染物研究较多。这是第一个研究中，制革相关的有机化学品污染的水进行了评估的定性和定量分析相结合。我们的定量分析表明，孟加拉国制革厂建成区运河水中总酚类化合物（酚类）的最大浓度，包括苯酚、双酚F、对甲酚和氯甲酚，比环境、健康和安全（EHS）指导值高出67倍以上。我们的研究结果表明，制革厂的酚类污染的来源。我们的原始净化剂，一种由镁和铁组成的类水滑石化合物（MF-HT），可以吸附各种酚类，并表现出最高的苯酚吸附能力（115.8 mg/g）的类水滑石化合物中报道。通过使用MF-HT与光催化反应的协助下，运河水样中的酚类物质的水平降低到低于指导值的水平。同时，该净化剂还可使运河水样中铬的平均含量（112.2mg/L）降低99.7%。因此，该净化剂具有解决制革相关的酚类和铬污染问题的潜力。
Water pollution caused by tannery wastewater is an important issue in developing countries. Most studies have focused on inorganic chemicals represented by chromium as a tannery-related main pollutant. This is the first study in which pollution of water by tannery-related organic chemicals was assessed by a combination of qualitative and quantitative analyses. Our quantitative analysis showed that the maximum concentration of total phenolic compounds (phenols), consisting of phenol, bisphenol F, p-cresol and chlorocresol, in canal water in a tannery built-up area in Bangladesh was >67-fold higher than the Environmental, Health and Safety (EHS) guideline value. Mapping of our results indicated tanneries as the sources of phenols pollution. Our original depurative, a hydrotalcite-like compound consisting of magnesium and iron (MF-HT), could adsorb all kinds of phenols and exhibited the highest phenol adsorption ability (115.8 mg/g) among reported hydrotalcite-like compounds. The levels of phenols in canal water samples were reduced to levels below the guideline value by using MF-HT with assistance of a photocatalytic reaction. Moreover, the mean level of chromium (112.2 mg/L) in canal water samples was decreased by 99.7% by using the depurative. Thus, the depurative has the potential for solving the problem of tannery-related water pollution by phenols and chromium.